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How does Dijkstra's Algorithm and A-Star compare?
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Great answer for anyone that knows heuristics ;)
– lindhe
May 19 '15 at 8:44
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Difference between Bridge pattern and Adapter pattern
...pattern example, imagine if you had a few implementations of a data store: one is efficient in space, the other is efficient in raw performance... and you have a business case for offering both in your app or framework.
In terms of your question, "where I can use which pattern," the answer is, wher...
Need some clarification about beta/alpha testing on the developer console
...is time you can send your app to your friends, families, or on your smartphones.
3. Beta testing - This is a serious matter, this is public testing. But people cannot give reviews to your app. You can also limit how many users can install the app.
4. Production - This is the last release, now everyb...
Java Enum definition
...eric in both the builder and the message. I'm pretty sure I wouldn't have gone down that route if I hadn't needed it though :)
– Jon Skeet
Mar 22 '12 at 6:45
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MySQL select 10 random rows from 600K rows fast
... specifically, if you have a gap at the start of your IDs the first one will get picked (min/max-min) of the time. For that case a simple tweak is MAX()-MIN() * RAND + MIN(), which is not too slow.
– Code Abominator
Aug 19 '14 at 4:16
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How can I get the corresponding table header (th) from a table cell (td)?
...It would be best to use an id to reference the table if there is more than one.
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Persistence unit as RESOURCE_LOCAL or JTA?
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As a side note: one still can get JTA functionality, even without a full Java EE application server by using third party solutions, like for example Atomikos. So you can have a lightweight web container like Tomcat and still get the JTA supp...
MongoDB vs. Cassandra [closed]
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Because everyone mentioned twitter here in relation to Cassandra: they are not using Cassandra for persisting tweets, they use still MySQL here (engineering.twitter.com/2010/07/cassandra-at-twitter-today.html). Ok, but I can imagine that ...
Concatenate two slices in Go
... only real overhead will be that it creates a new slice if you didn't have one already, like: foo(1, 2, 3, 4, 5) which will create a new slice that is will hold.
– user1106925
Sep 24 '14 at 14:00
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What is a mixin, and why are they useful?
...ou want to provide a lot of optional features for a class.
You want to use one particular feature in a lot of different classes.
For an example of number one, consider werkzeug's request and response system. I can make a plain old request object by saying:
from werkzeug import BaseRequest
class...